Newsweek and Time Are Two Competing Weeklies, Each of Which $\mathrm{N}$

Multiple Choice

Newsweek and Time are two competing weeklies, each of which tries to keep their readership while trying to get the other's readers to switch. Among all the households holding yearly subscription to Newsweek or Time but not both, let $\mathrm{N}$ and $\mathrm{T}$ denote the states that a household is a current Newsweek or Time subscriber, respectively. The probabilities of switching from one state to the other after one transition (when they renew) are given by the tree diagram. (For simplicity, it may be assumed that all annual subscriptions expire on December 31st of the year and are renewed by all of them for one or the other but not both magazines for one year.) If the current number of households subscribing for Newsweek and Time is respectively 2000 and 4000, what would be the number of subscribers to Newsweek in the steady state, that is after very many renewals?

A) 2000
B) 4000
C) 3300
D) 4400